Shelf



FIG. 1 is a left upper perspective view of a shelf.

FIG. 2 is a right lower perspective view of the shelf of FIG. 1.

FIG. 3 is a front view of the shelf of FIG. 1.

FIG. 4 is a rear view of the shelf of FIG. 1.

FIG. 5 is a right side view of the shelf of FIG. 1.

FIG. 6 is a left side view of the shelf of FIG. 1.

FIG. 7 is a top view of the shelf of FIG. 1; and,

FIG. 8 is a bottom view of the shelf of FIG. 1.

The broken line showing is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a shelf, as shown and described. 